PSLE The perimeter of figure GHJKL is (5
p + 11) cm. The perimeter of square GHJK is 8 cm.
- Find the perimeter of triangle GKL in terms of p.
- The perimeter of figure GHJKL is 41 cm. What is the value of p? Give your answer in cm.
(a)
Length of the square
= 8 ÷ 4
= 2 cm
Total lengths of GH, HJ and JK
= 3 x 2
= 6 cm
Perimeter of triangle GKL
= 5
p + 11 - 2 - 2
= (5
p + 7) cm
(b)
5
p + 11 = 41
5
p = 41 - 11
5
p = 30
p = 30 ÷ 5 = 6
Value of
p = 6 cm
Answer(s): (a) (5
p + 7) cm; (b) 6 cm